.OTLN File Extension

File TypeOpal Outline File

Unknown

File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.

What is an OTLN file?

Outline created by Opal, an outlining program for Mac OS X; creates hierarchical lists for organizing notes, projects, reports, ideas, etc.; Opal is the successor to Acta and has been completely rewritten for Mac OS X.

About OTLN Files

Our goal is to help you understand what a file with a *.otln suffix is and how to open it.

The Opal Outline file type, file format description, and Mac programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.